Peter Kareiva, director of UCLA Institute of the Environment and Sustainability, has ruffled a few feathers over the years.

In a wide-ranging interview, Kareiva spoke with reporter David Nazar about how environmental activists should come together with business leaders, how the world can have both jobs and sustainability — and the “existential threat” everyone on the planet must face. 

“Climate change is an existential threat. Globally if you disrupt climate systems enough that major weather patterns, major air streams and ocean circulation… it’s going to change the experience of nations in a way that the nations are going to be disrupted,” Kareiva said. “You have to accept that there is a finite probability that that could happen — and that should give you pause.”

Watch the full interview: